Aeroplane construction.



unirse FRITHIOF GUSTAF EBJCSON, OF TORONTO, ONTARIO, GANADA, ASEGIGTZ i DFAN AEROPLANES LIMITED, F TORONTO, Ol''ltl, EAID, CCL. e

emana.

AEROPLAHE CONSTRUCTION.

Application iled May 31, .t. I Serial lio. 172,034;

tion, of which the following is the specification.

'.My invention relates to improvements in aeroplane construction, and the object of the invention is to devise a form 'of bar for the ends and back of the plane, which will not only be strong and durable, but also'- enable the webv and the fabric to be secured thereto without any liability of the bar rusting due to the treatment .of the fabric,'or`

other causes, and dispense with a tubular bar lwhich splits.

. My .'nvention consists yoa' bar V-shape in cross section, the V form being Idisposed horizontally, webs with upper and lower ribs, the endsoi2 which embrace the outside of the V bar at the top and bottom, and a securing strap passing around the bar and g5 ribs of the web to which it is suitably secured, the parts being otherwise constructed and arranged in detail as hereinafter more 1 particularly explained.

g- Figure 1, is a perspective view showing a portion ofthe bars and webs to exhibit myv invention.

f Fig. 2 is a perspective detail showing portion of the bar. l In the drawings like letters ofl reference indicate corresponding parts in each figure. 1 is the longitudinal bar, which Jforms the back and end bar of the aeroplane, and which is Vfshape in cross section. 2 are the webs, which are formed of a central portion 2* and top and bottom ribs 3 tapered toward the end andextending to the top and the bottom of the V-shape bar, which it `will be seen is horizontally disposed.

4 is a metal strap, which is suitably sei5 cured to the top and bottom ribs 3 and. eX-

tends around the bar 1 at the outside as indicated.

The bar l ismade of steel and is copper plated in order to prevent fabric when it is treated from affecting or rusting the steel as the ccpperplating both extends to the inside and outside of the bar.

Heretoor'e it has been thecommon practicesfgto use tubular bars, which although they are copper plated on the outside will rust on the inside and thereby' deteriorate, and, therefore, be a dangerous element in a plane, 4 in which itis so essential that every element should preserve its strength Again the diiiiculty in b nding the tube was also very great, but by he construction of my bar the bending is very m'uch more easily facilitated, and the barV is formedwithout cracking either when bending into flattened form or when bending the bar in a horizontal plane to form an angle.

I wish also to draw attention to the peculiar inturn 1' of the bar at the inner end or open mouth of the bar. Should the fabric of the plane sag, as it frequently does, this inturned end prevents any liability of the barcutting or otherwise injuriously aectingthe fabric. l

What l claim. as my invention is.

1. in an aeroplane, a bar if-shape in cross section and having the V disposed horizontally with the open end of the V to the inside, the edges of the bar being curved inwardly toward each other.

2. In an aeroplane, the combination with the bar V shape in cross section and disposed horizontally with the open end of the V to the inside, oi' a web having the upper and lower ribs tapered ed to and fitting the upper and lower portions of the bar, and an encompassing strap suitably held on the ribs and enten-:ling around the front of the bar. 

